Wrench.



No. 804,438. PATENTED NOV. 14, 1905. F. L. ROBINSON.

WRENCH.

APPLIOATION FILED APB. 1, 1905.

UNTTTET) STATES FRED L. ROBTNSON, OF VVAYLAND, NEW YORK.

WHElNllCl-l.

Specification of Letters Patent.

Patented Nov. 14, 1905.

Application filed April l, 1905. Serial No. 253,331.

To ai?, 'LU/wm t may concer/t:

Be it known that I, FRED LROBINsoN, a'citi- Zen of the United States, residing at Wayland, in the county of Steuben and State of New York, have invented certain new and useful Improvements in Wrenches; and I do declare the following to be a full, clear, and exact description of' the invention, such as will enable others vskilled in the art to which it appertains to make and use the same, reference being had to the accompanying' drawings, and to the letters of reference marked thereon, which form a part ofl this specification,

This invention relates to a wrench, and particularly to a construction embodying a laterally-movable adjusting-jaw.

The invention has for an object to provide means for mounting' this movable jaw so that it may travel into parallelism with the contact-face of the fixed jaw and be returned to its inward position in order to quickly release the wrench when desired.

Other andfurther objects and advantages of the invention will be hereinafter set forth, and the novel features thereof defined by the appended claim.

In the drawings, Figure l is a perspective view of the invention. Fig. 2 is a longitudin nal section through the jaws, and Fig. 3 is a detail perspective of the removable contactface or fixed jaw. Fig. et is a detail view of a wear-plate, which also serves to hold the spring in contact with the fixed jaw of the wrench.

Reference now being had to the details of the drawings by letter, A designates a handle which may be of any suitable size or configuration and is provided with an extension A at one side thereof provided with a longitudinally-disposed aperture A2, through which the threaded shank B of the movable jaw B passes. This extension is also provided with a transverse opening A3 to receive the adjusting-nut B2, threaded upon the shank of the jaw B, which extends beyond the opposite sides of the extension, as is usual in this art. One wall of the aperture A3 is provided with a wear-plate Ai, disposed obliquely to the opposite wall of this aperture. The handle is also provided with a seat A'r, terminating at the rear in a shoulder A6, against which the contact-face O, comprising the fixed jaw of the wrench, is adapted to abut. This face or jaw is mounted for removal and reversal by means ofl a depending rib O, provided with a securing-aperture C", and is held in position by a removable pin O3 passing through the slots of the body and the aperture O2. It will be observed that the under face of this rib O/ is ciii'ved or cut away at its inner end, and eX- tending beneath the rib, so as to beheld thereby, is a tension-spring D, which at its outer free end D bears against the shank B/ of the movable jaw, so as to force it into contact with the opposite wall of the aperture through which it passes.` The seat for the plate or fixed jaw C is disposed at the saine angle as the wear-plate, and the face of the jaw corresponds to that angle, so that when the parts are in normal position, as shown by full lines in'Fig. 2, the tension of the spring holds the face of the movable jaw out of parallelism with the face of the fixed jaw, while when tension is once applied to the handle of the wrench these jaws are moved until their faces come into parallelism and this spring placed under tension. The result of this is to adapt the wrench for application either to a pipe or to a nut and also to secure a quick-gripping action when pressureis applied to the wrenchhandle, and when this pressure is released the spring at once relieves this gripping actiony by throwing the movable jaw out of parallelism with the fixed jaw. Fach of these jaws is roughened or toothed in the usual manner, and the direction of the teeth upon the fixed jaw may be varied by a reversal there-of. It will be apparent that this disposal of the wear plate or face of the aperture against which the adjusting-nut abuts in the lateral travel of the movable jaw relative to the inclination of the fixed jaw permits a greater extent of travel between the parts, by which amore efficient gripping action is secured and the inovable jaw held out of' parallelism with its cooperating member.

It will be obvious that changes may be made in the details of the construction and configuration of the device without departing from the spirit of the invention.

Having thus fully described my invention, what l claim as new, and desire to secure by Letters Patent, is

A wrench, comprising a movable jaw, having a threaded shank portion, a handle having' a chambered end in which said shank portion is held, a nut mounted in said chambered portion of the handle and engaging the threads of said shank portion, the forward end of said chambered portion being recessed, a fixed jaw mounted in said recess, the inner end of said fixed jaw being convexed, a wear-plate mount- IOO IIO

ed in the ehambered portion of said handle yieldingly against the shank portion of the and seated against ashoulder therein, and havmovable jaw, as set forth. IO ing an elongated slot through Which the shank In testimony whereof I hereunto aX my portion of the movable jaw has a play and signature in presence of two Witnesses.

against which plate said nut is adapted to FRED L. ROBINSN. bear, a spring seated in said recess and held lvitnesses: by said Wearvplate against the rear edge of G. H. STANNARIUS,

said fixed jaw at its inner end and bearing C. B. ZIMMERMAN. 

